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" If these considerations are well founded," he continues, " the objections of those who study insects or molluscs, — for example, that our regions are not true for their departments of nature, — cannot be maintained. For they will find, that a careful... "
Bulletin of the United States Geological and Geographical Survey of the ... - Page 316
by Geological and Geographical Survey of the Territories (U.S.) - 1878
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The Geographical Distribution of Animals: With a Study of the ..., 1. köide

Alfred Russel Wallace - 1876 - 503 lehte
...affecting their perpetuation and increase in each locality. If these considerations are well founded, the objections of those who study insects or molluscs,...true for their departments of nature — cannot be VOL. L— 6 maintained. For they will find, that a careful consideration of the exceptional means of...
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THE GEOGRAPHICAL DISTRIBUTION OF ANIMALS

ALFRED RUSSEL WALLACE - 1876
...affecting their perpetuation and increase in each locality. If these considerations are well founded, the objections of those who study insects or molluscs,...true for their departments of nature— cannot be VOL. I.— 6 maintained. For they will find, that a careful consideration c the exceptional means of...
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Bulletin of the United States Geological and Geographical Survey ..., 4. köide

1878
...by their exceptional means of dispersion or by special conditions affecting their perpetuation and increase in each locality." " If these considerations...objections of those who study insects or molluscs, for example,—that our regions are not true for their departments of nature—cannot be maintained. For...
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The Geographical Distribution of the Mammalia: Considered in Relation to the ...

Joel Asaph Allen - 1878 - 377 lehte
...exceptional means of dispersion or by special conditions affecting their perpetuation and increase iu each locality." " If these considerations are well...objections of those who study insects or molluscs, lor example, — that our regions are not true for their departments of nature — cannot be maintained....
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Proceedings of the Biological Society of Washington, 1–3. köide

Biological Society of Washington - 1882
...by their exceptional means of dispersion or by special conditions affecting their perpetuation and increase in each locality." "If these considerations...divergences from the normal distribution of higher animals. "f Mr. Allen recalls that he had in 1871 "claimed, in accordance with the views of Humboldt, Wagner,...
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Proceedings of the Biological Society of Washington, 1–3. köide

Biological Society of Washington - 1882
...by their exceptional means of dispersion or by special conditions affecting their perpetuation and increase in each locality." " If these considerations...molluscs, — for example, that our regions are not trup for their departments of nature, — cannot be maintained. For they will find, that a careful...
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Bulletin of the American Museum of Natural History, 4. köide

American Museum of Natural History - 1892
...affecting their perpetuation and increase in each locality. If these considerations are well founded, the objections of those who study insects or molluscs,...divergences from the normal distribution of higher animals."1 While the divisions of North America, as set forth in the present paper, are presented from...
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Proceedings of the Biological Society of Washington, 2. köide

Biological Society of Washington - 1885
...by their exceptional means of dispersion or by special conditions affecting their perpetuation and increase in each locality." "If these considerations...divergences from the normal distribution of higher animals, "f Mr. Allen recalls that he had in 1871 "claimed, in accordance with the views of Humboldt, Wagner,...
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